See the data version history.
The data of old versions are not available at WDCGG.

Updated Date	Version * : the latest version # : used for analysis in the WMO GHG Bulletin (#Volume)	GAW ID	Station/Mobile	Gas Species † met : with meteorological data	Platform	Sampling Type	Buffer	Organization	Details
2023-07-20	0016-5015-1001-01-01-9999 -2023-07-19-1827* #20	MQA	Macquarie Island	CO2	surface	insitu	data1	CSIRO (Commonwealth Scientific and Industrial Research Organisation)	click
2021-07-16	0016-5015-1001-01-01-9999 -2021-07-15-1202 #18	MQA	Macquarie Island	CO2	surface	insitu	data1	CSIRO (Commonwealth Scientific and Industrial Research Organisation)